https://www.youtube.com/watch?v=TenIFtjgcvA
http://www.nature.com/news/these-seven-alien-worlds-could-help-explain-how-planets-form-1.21512
https://www.washingtonpost.com/news/speaking-of-science/wp/2017/02/22/heres-what-you-should-know-about-the-new-trappist-1-solar-system/?utm_term=.3f490b5fda5e
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